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Novel 5MgO–3Li2O–4WO3 ceramic: preparation, phase evolution and its microwave dielectric properties

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Abstract

A new low-temperature firing microwave dielectric ceramic with the composition of 5MgO–3Li2O–4WO3 was synthesized by a solid-state reaction method. The ceramic was found to be a novel pure compound (Li2Mg2W2O9) when the sintering temperature was 720–760 °C, but transformed to mixed phases with Li2Mg2W2O9 and Li2WO4 when the sintering temperature was 820–840 °C. The ceramic sintered at ~820 °C exhibited good properties with relative permittivity of ~10.3, Q × f value about 20,537 GHz (at the frequency f ~ 11 GHz) and a negative temperature coefficient of resonant frequency of −76.9 ppm/°C. 5MgO–3Li2O–4WO3 ceramic had a promising application in low-temperature cofired ceramic technology.

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Acknowledgments

This work was supported by Natural Science Foundation of China (Nos. 11464009 and 11364012), Natural Science Foundation of Guangxi (No. 2013GXNSFAA019291, 2014GXNSFAA118326, and 2014GXNSFAA118312), Research Start–up Funds Doctor of Guilin University of Technology (Nos. 002401003281 and 002401003282) and Project of Outstanding Young Teachers’ Training in Higher Education Institutions of Guangxi.

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  1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, People’s Republic of China

    Huanfu Zhou, Jianzhang Gong, Jungu Xu, Guangchao Fan & Xiuli Chen

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  1. Huanfu Zhou
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  2. Jianzhang Gong
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Correspondence to Huanfu Zhou.

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Zhou, H., Gong, J., Xu, J. et al. Novel 5MgO–3Li2O–4WO3 ceramic: preparation, phase evolution and its microwave dielectric properties. J Mater Sci: Mater Electron 27, 6389–6394 (2016). https://doi.org/10.1007/s10854-016-4574-6

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